THEMA: Two questions displaying as one

A Limesurvey novice here, so please excuse if this is a really dumb question!

I need to display two questions as one. The first is a Multiple Numerical Input question with a slider, the second is a radio button list.

I'm using the basic template with v2.00 build 130526 and presenting the survey one question at a time.

I found the code below on these forums - it hides the second question and moves the radio buttons to the first question. This works well when you test the question group, but if you test the complete survey it still presents them one at a time (and I'm guessing that's how they'll get presented in the activated survey.)

What I ideally want is for both questions to be displayed on the same page, and a single submit button to return the answers for both questions at once. The questions are both mandatory btw, but the radio button question has code to default it to one particular answer.